Fix: Hearthstone won’t load

Ivan Jenic By: Ivan Jenic
4 minute read

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Hearthstone’s popularity is well deserved. Blizzard made a right move with this game, even though it was primarily just an experiment. Nowadays, this collectible card game gathers more than 60 million players. And the numbers are growing on the daily basis.

Game’s simplistic graphics and low requirements are the valid reasons for its popularity. Nevertheless, even the best-optimized games can have an issue or two. One of those rare but critical issues is API loading error. In this article, we’ll try to address this problem.

How to repair loading errors in Hearthstone

 Try out other servers

On some occasions, your native server can be the reason for this issue. Therefore, you should try and switch the realm in order to troubleshoot it. If you are still prompted with an error, move on to the next solution.

Update GPU drivers and redistributables

You should at any time have the latest drivers. Additionally, it seems that the DirectX and Visual C can inflict a lot of errors. Therefore, updating them will make the problem easier to troubleshoot.

Run the game in the compatibility mode

Compatibility mode will let your system adapt the game to an older version. Moreover, many users had a problem after upgrading to Windows 10. Rather than downgrading your system, try this out:

  1. Right-click Hearthstone and open Properties.
  2. Move on to the Compatibility tab.
  3. Check the ‘Run this program in compatibility mode for’ box.
  4. Choose Windows 7.
  5. Save your settings and start the game.

Repair the game using Battle.net client

Battle.net desktop app has a built-in repair tool for incomplete or corrupted game files. It is worth trying out in this on similar occasions. You can use Scan & Repair tool this way:

  1. Open your Battle.net client.
  2. Highlight Hearthstone.
  3. Click Options menu above the game title.
  4. Choose Scan and Repair.
  5. Close the app and restart your PC.
  6. Start the game.

If the problem proves is not related to game installation, clearing cache is next obvious step.

Delete Battle.net cache folder in Program Data

Cache files can get corrupted, too. While this doesn’t happen too often, it mostly happens after an update. As a result, your game can have numerous issue. You can delete game cache this way:

  1. Close the game and Battle.net app.
  2. Make sure you ‘kill’ all game-related processes in Task manager.
  3. Go to the system partition.
  4. Enable view of Hidden Folders.
  5. Open Program Data.
  6. Select Blizzard Entertainment.
  7. Open Battle.net folder.
  8. Delete Cache folder.

Perform a clean reinstall of Hearthstone

If the previous solution proved insufficient, reinstallation is next viable solution. Furthermore, there is a possibility that the game system integration is the main reason for the loading failure. You can reinstall the game in a few easy steps. In addition, we want the clean install, so you’ll  have to use any registry cleaner and delete the installation folder manually.


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patented Technologies (requires upgrade).

  1. Open Battle.net desktop app.
  2. Select Hearthstone.
  3. Open Options placed above game title.
  4. Choose Uninstall Game.
  5. After the process is finished, delete existing remainings of game install folder.
  6. Use registry cleaner (CCleaner is a viable choice) and clear registry.
  7. Restart your PC and reopen Battle.net client.
  8. Highlight Hearthstone and install the game.

Use Windows File Checker tool

All of the previous steps are basically oriented on game issues. But, on some occasions due to corrupted system files, the game can suffer various problems. Therefore, you should download the Windows File Checker and look out for faulty files. You can run mentioned tool this way:

  1. Open Start and in the Run type CMD.
  2. You should see Command Prompt feature.
  3. Right-click and choose Run as administrator.
  4. In the command window type sfc /scannow.
  5. Wait until the process is completed.
  6. Close the window and restart your PC.

Tweak Kernel32

The good folks of Blizzard community suggested an additional workaround. We find it a bit risky since it involves tweaking Windows Kernel files. And we all know that can, in the worst scenario, result in complete system crash. However, we will walk you trough process, step by step, and show you how to do it.

  1. Go to your system partition.
  2. Open Windows\System32.
  3. Find Kernel32.dll and copy-paste it to Hearthstone_Data\Plugins
  4. Move or rename MemModule32.dll from Plugins.
  5. Rename Kernel32.dll in Plugins folder to MemModule32.dll.
  6. Start the game.

Please note that you may need the administrative permission in order to do these steps.

We hope that presented workarounds will let you play Hearthstone again. If you have related issues or any suggestions or concerns, please tell us in the comments.

RELATED STORIES YOU NEED TO CHECK OUT:

For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patented Technologies (requires upgrade).

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